Tuesday, 31 January 2012

Honeybee problem nearing a ‘critical point’ | Grist

Photo: Pesticide Action Network North AmericaAnyone who’s been stung by a bee knows they can inflict an outsized pain for such tiny insects. It makes a strange kind of sense, then, that their demise would create an outsized problem for the food system by placing the more than 70 crops they pollinate — from almonds to apples to blueberries — in peril.

“We are inching our way toward a critical tipping point,” said Steve Ellis, secretary of the National Honey Bee Advisory Board (NHBAB) and a beekeeper for 35 years. Last year he had so many abnormal bee die-offs that he’ll qualify for disaster relief from the U.S. Department of Agriculture (USDA).

In addition to continued reports of CCD — a still somewhat mysterious phenomenon in which entire bee colonies literally disappear, alien-abduction style, leaving not even their dead bodies behind — bee populations are suffering poor health in general, and experiencing shorter life spans and diminished vitality. And while parasites, pathogens, and habitat loss can deal blows to bee health, research increasingly points to pesticides as the primary culprit.

“In the industry we believe pesticides play an important role in what’s going on,” said Dave Hackenberg, co-chair of the NHBAB and a beekeeper in Pennsylvania.

Of particular concern is a group of pesticides, chemically similar to nicotine, called neonicotinoids (neonics for short), and one in particular called clothianidin. Instead of being sprayed, neonics are used to treat seeds, so that they’re absorbed by the plant’s vascular system, and then end up attacking the central nervous systems of bees that come to collect pollen. Virtually all of today’s genetically engineered Bt corn is treated with neonics. The chemical industry alleges that bees don’t like to collect corn pollen, but new research shows that not only do bees indeed forage in corn, but they also have multiple other routes of exposure to neonics.

The Purdue University study, published in the journal PLoS ONE, found high levels of clothianidin in planter exhaust spewed during the spring sowing of treated maize seed. It also found neonics in the soil of unplanted fields nearby those planted with Bt corn, on dandelions growing near those fields, in dead bees found near hive entrances, and in pollen stored in the hives.

Evidence already pointed to the presence of neonic-contaminated pollen as a factor in CCD. As Hackenberg explained, “The insects start taking [the pesticide] home, and it contaminates everywhere the insect came from.” These new revelations about the pervasiveness of neonics in bees’ habitats only strengthen the case against using the insecticides.

The irony, of course, is that farmers use these chemicals to protect their crops from destructive insects, but in so doing, they harm other insects essential to their crops’ production — a catch-22 that Hackenberg said speaks to the fact that “we have become a nation driven by the chemical industry.” In addition to beekeeping, he owns two farms, and even when crop analysts recommend spraying pesticides on his crops to kill an aphid population, for example, he knows that “if I spray, I’m going to kill all the beneficial insects.” But most farmers, lacking Hackenberg’s awareness of bee populations, follow the advice of the crop adviser — who, these days, is likely to be paid by the chemical industry, rather than by a state university or another independent entity.

Beekeepers have already teamed up with groups representing the almond and blueberry industries — both of which depend on honey bee pollination — to tackle the need for education among farmers. “A lot of [farm groups] are recognizing that we need more resources devoted to pollinator protection,” Ellis said. “We need that same level of commitment on a national basis, from our USDA and EPA and the agricultural chemical industry.”

Unfortunately, it was the EPA itself that green-lit clothianidin and other neonics for commercial use, despite its own scientists’ clear warnings about the chemicals’ effects on bees and other pollinators. That doesn’t bode well for the chances of getting neonics off the market now, even in light of the Purdue study’s findings.

“The agency has, in most cases, sided with pesticide manufacturers and worked to fast-track the approval of new products, and failed in cases when there’s clear evidence of harm to take those products off the market,” Towers said.

Since this is an election year — a time when no one wants to make Big Ag (and its money) mad — beekeepers may have to suffer another season of losses before there’s any hope of action on the EPA’s part. But when one out of every three bites of food on Americans’ plates results directly from honey bee pollination, there’s no question that the fate of these insects will determine our own as eaters.

Ellis, for his part, thinks that figuring out a way to solve the bee crisis could be a catalyst for larger reform within our agriculture system. “If we can protect that pollinator base, it’s going to have ripple effects … for wildlife, for human health,” he said. “It will bring up subjects that need to be looked at, of groundwater and surface water — all the connected subjects associated [with] chemical use and agriculture.”